Azo dyestuffs and process of making same



Patented May 29, 1923.

' um'rsn STATES FFEQE.

aueus'r LEOPOLD LASKA AND ARTHUR zrrscnna, or QFFENBACH-ON-THE-MAIN,

GERMANY, ASSIGNORS TO THE CORPORATION CHEMISCHE FABRIK GRIESHEIM- ELEKTRON, or FRANKFORT-ON-THE-MAIN, GERMANY.

AZO DYESTUFFS AND PROCESS OF MAKING No Drawing.

To all whom it may concern:

Be it known that we, AUGUST LEOPOLD LASKA and ARTHUR ZITSCHER, both citizens of Germany, and residents of Offenbach-onthe-Main, Germany, have invented certain new and-useful Improvements in Azo Dyestufi's and Processes of Making the Same, of which the following'is a specification.

Our invention relates to especially valuable dyestuffs, which can be obtained by combining any diazocompound with orthoalkyloxyarylides of the 2.3-oxynaphthoic acid of the general formula:

in NW4;

-co- NH 4 Alkyl o 2 Aryl ex,

wherein R means hydrogen or any radicle.

The dyestufis can be used for the production of color lakes of an excellent fastness to light and give, when produced on the fiber, orange to blue and black shades of a singular fastness to light, they are when dry orange to blue and black powders, insoluble 1n water, soluble in sulfuric acid to a violet to green solution yielding upon reduction with stannous chloride an amin and an ortho-- pared by dissolving it in dilute caustic soda l e and precipitating with dilute acetic acid.

he dyestufi separates in brightly reddish flakes, it is filtered, when the combination is complete, washed until neutral and advanta eously used in .the form of a paste. Mixed with the usual substrata it forms color lakes of an excellent fastness to light.

Instead of ortho-anisidid we ma use ortho-phenetidid of the 2.3-oxynapht oic acid.

Application filed January '8, 1923. Serial no. 611,503. E E5 aqueous suspension of 30.7 parts of ortho- EXAMPLE 2.

Production of the dyestufi's on the fiber.

Padding-bath.

10 gr. of ortho-anisidid of 2.3-oxynaphth01c ac1d are well stirred with 20 com. of caustic soda lye of 34 B. and. 20 ccm. of Turkey red 011, dissolved with 200 ccm. of hot water and'made up to 1- litre.

The cotton goods, which are impregnated with this solution, are well wrung out and then developed in the following:

Dye-bath.

3 gr. of 4-chloro-12-toluidin are diazotized 1n the usual manner, the solution is diluted with cold water to 1 litre, neutralized with sodium acetate and 50 gr. ofnommon salt are added. u y

The dyed oods are rinsed, as usually, with cold an warm water, then soaped, while well boiling, rinsed again and dried.

Printing-directions.

The textile fabric is impregnated with a solution of 12 gr. of 5-chloro-ortho-anisidid of 2.3-oxynaphthoicacid .per litre, dried and then printed with the following printingcolor: I

i 300 gr. of 4-chloro-L2-toluidin are diazotized in the usual manner and the diazosolution is made up to 10 litres.

Printing-color.

4500 ccm. of the diazo solution, 4000 gr. of tragacanth thickening 1 :20,

' 1000 ccm. of aluminium sulfate 1:1,

500 ccm. of sodium acetate 1: 1

After printing the goods are dried at 4050 (3., soaped with a warm and feebly alkaline solution of soap and rinsed with hot water.

The following table gives the tints of a number of the dyestuifs, prepared according to the present process, and of the color lakes obtained therefrom:

Dlazocompound of-- Combined with- Shades. Diezocompound of Combined with Shades.

S-chloroanilin Ortho-anisidid of Orange. 5-nitro-L2-toluidin 2.3-oxynaphthoyl- Red.

2.3-oxynaphthoic 4-chloro-l .2-

acid. anisidin. I 2-chloroaniline Yellowish red. 3-nitro-1 .4-toluidin .do Reddish bordeaux. 2.5-dichloroani1in. Yellowish red. m-aminoazotoluene .do e Smet. 4-chloro-L2-to1uidin. Red. 5-chloro-L2-toluidin 2.3-ox aphthoyl- Bluis red. 5-chloro-L2-toluidin. Bluish red 5-c lore-1.2- 6-ehloro-L2-toluidin ed. anlsidin. v 4-chloro-L3-toluidin, Yellowish red. 6-chloro-L2-tolu1din i ellowish red. 4-ch1oro-L2-anisidin. Bluish red. -ch ro-L2-anisidin Bordeaux. -nitm-1.2.anisidj Bordeaux. 3-nitro-1A-toluidin. o Bordeaux. 4-nltro-L2-am'sidin Red. 3-n1tro1.4-toluidin.. -oxy'naphthoyl- Bluish red. 4-nitro-L2-tolujdj Yellowish red. 4- nitro-1.2-amsi- 5-nitr0-1.2-toluidin.. Bordeaux. din. I 3.n1tro.1,4-to]ujdjn B rde 5-mtro-L2-amsidin .do l h bordeaux. 4-ch1oro-2-nitroanjlin .do Bordeaux. 2.5-d1chIoroanilin 2.3-oxynaphthoyl- Yellowish red. 3-nitro-1 .4-toluidin Ortho-phenetidid Red. 3 a m i n o 1 4 of 2.3-oxynaphcresohnethylthoic acid. ether. achlom-znitroanillm Bluish red. (1 Bluish red.

Dianisidin Reddish blue. Bordeaux. Ortho henetol ezo Black. 2.5-dichloroanilin. Yellowish red.

napht oylamin. 4-ch1oro-L2t0luidjn 2.3-0): phthoyl- Red. 0 r e s o l e t h y l 4-c lore-1.2- ether. J anjsidin. -ngtro-lA-toluidin .do u sh red.

' 5-chloro-L2-toluldin Bluish red. 5-n tro-L2-toluidin .do u Sh red- 6-ch1om-1.2-toluidin Red. 4-mtro-L2-anisidin 2.3-oxynaphthoyl- Red. 2-chIoro-1.4-toluidin Red. arninohydroqui- 3-ch1oro-L4-to1uidin. R none-dimethyl- 4-ch1oro-znitroanilin BllllSh red. ether. 4-eh1 .1 2.a 1 idi Bordeaux. 4-chloro-L2-anisidin .do Bluish red. 5-ch1or0-L2-ani idjn, 'Red dish bordeaux. 2.5dichloroanilin .do Brownish orange. 4-nitro-L2-anisidin B u red- Now what we claim and desire to secure by Letters'Patent is the following:

1. As new articles the azody'estufls, which can be obtained by combining any diazocompound with an ortho-alky oxyarylid of 2.3-oxynaphthoic acid, having probably the general formula:

Aryl

I Rr.... .7g g;

wherein R means hydrogen or any radicle, which can be used for the production of color lakes of an excellent fastness to light and give, when produced on the fiber, orange to blue and'black shades of a singular fastness wherein R means hydrogen or any radicle.

8 As new articles the azodyestufis, which furic acid to a violet to green can be obtained by combining any diazocompound with an ortho-methoxyarylamin of 2.3-oxynaphthoic acid, having probably wherein R- means hydrogen or any radicle, which can be used for the production of color lakes of an excellent fastness to light and give, when produced on the fiber, orange to blue and black shades of a singular fastness to light, they are when d orange to blue and black powders, insolub e in water, soluble in sulfuric acid to a violet togreen solution yielding upon reduction with stannous chloride an amin and an ortho-methoxyarylamin of the l-amino-2-oxy-3-naphthoic acid.

4. The process of making azodyestufls consisting in combining any diazocompound with an orthomethoxyarylamin of 2.3-oxynaphthoic acid of the general formula:

a CO g 2 c.n. wherein means hydrogen or any radicle.

'In testimony that we claim the foregoing as our invention, we have signed our names.

AUGUST LEOPOLD LASKA. ARTHUR ZITSCHER. Witnesses:

- W. Sorrow,

O. C. L. B. Wm. 

